diff --git a/src/hb-ot-math-table.hh b/src/hb-ot-math-table.hh
index a8c9af30d..c702e42e2 100644
--- a/src/hb-ot-math-table.hh
+++ b/src/hb-ot-math-table.hh
@@ -1107,6 +1107,7 @@ struct MATH
   // https://github.com/harfbuzz/harfbuzz/issues/4653
   HB_INTERNAL bool is_bad_cambria (hb_font_t *font) const
   {
+#ifndef HB_NO_MATH
     switch HB_CODEPOINT_ENCODE3 (font->face->table.MATH.get_blob ()->length,
                                  get_constant (HB_OT_MATH_CONSTANT_DISPLAY_OPERATOR_MIN_HEIGHT, font),
                                  get_constant (HB_OT_MATH_CONSTANT_DELIMITED_SUB_FORMULA_MIN_HEIGHT, font))
@@ -1117,6 +1118,7 @@ struct MATH
       case HB_CODEPOINT_ENCODE3 (25722, 2500, 3000):
         return true;
     }
+#endif
     return false;
   }